The company reported earnings of US$38.1 million, 31 cents per share, in the quarter ending November 1.
Year-earlier figures were US$35.8 million (28 cents per share). Revenue increased 3% to US$1.29 billion.
Petsmart forecasts it will earn US$1.50 to US$1.54 per share for the full fiscal year.
New shelter data casts doubt on whether the pet population and pet ownership are truly growing.
While the pandemic caused unprecedented suffering worldwide in 2020, the disruptions to dogs, cats and other pets adoption numbers may normalize in 2021.